A shortened term for "the generous drunk". You know the one i mean. Out of your selection of mildy faithful friends, he/she is the one that often earns more money than others but isnt a dick about it, and hence when you go out drinking with them, they offer to buy you many things such as a flaming sambuca, a taxi ride or a nasty tasting kebab.
(Tristan pays 10 euros for the taxi)
Taxi Driver: "I still need 60 cent"
Steve: I've got a spare...
Tristan interjects: NOO, I'VE GOT IT!!
Tristan: "Are you getting a kebab??"
Elliott: "Hmm no, i don't think i...
Tristan interjects threateningly: " I'LL BUY YOU A KEBAB!!"
Elliott (fearful of death): o.k....
Tristan is therefore the Generunk.
When a person drops a coin and a rhythmic circular movement ensues, causing the coin to breakdance so fast, that it can only be stopped by standing on it.
(man drops coin):
Man 1 : ohhh man look at that coin go!
Man 2 : yeah fam
, that coin is breakdancing!
Man 1 : Yeah, that is one sick Breakdancing Coin